Anyway, did we get to the chess room? Did you undo the spell?
If possible, let one of the girls who isn't doing anything stand in the amusement park and wave at Sen. Maybe Agam will approach the border. If Sen attacks randomly, sooner or later he'll switch from Agam to the girl, enter the zone, and get stunned. However, if he has partially retained his sanity, it might not work, but we don't have any other ideas./
/And yes, when we walk down the corridor, Agam gives the others a couple of turns' head start so they can run away./